[mosesbotbol]

Rolex keep as good a time as any other watch of that caliber. As long as they have the same vibration, they should have similar accuracy until they wear. The more jeweled the watch is, the less need for oil and oil oxidizes over time. Rolex is known for accuracy and ruggedness of the movement.

You watchsmith probably saw more Rolex as there are a lot of them. Current production is 800K+ a year. So, even if they were making 300k+ 30 years ago, that millions and millions of Rolexes around the world.

All automatic watch should be serviced about 4 years. If you have a tool to remove the case back, you can play around the advancement, but if it need service, it needs service.